Synup was founded in 2014. They offer a free lookup of your business information in the top 180 directories and allow you to pick and choose the sites you want to add or edit citations on.

The service costs $1.5 per citation and they provide comprehensive reporting along with screenshots upon completion of the service. There is no minimum commitment in terms of number of citations with Synup and you can do as low as 1 or as high as 150 citations per location.